Traction apparatus.



PATENTED'JAN. 30, 1906. N. HISS & H. G. DE BURBN.

TRACTION APPARATUS. APPLICATION FILED MAY?, 1903.

Th carrier 2 may su port some or all the UNITE, vSTATES PATENT OFFICE.

NELSON HISS AND HENRI G. DE BUREN, OF NEW YORK, N. Y., ASSIGNORS, BY DIRECT AND MESNE ASSIGNMENTS, TO ELEVATOR SECURITIES COM- PANY, A lCORPORATION OF NEW JERSEY.

TRACTION APPARATUS.

No. 810,941. Specification of Letters Patent.

Application filed May 7,1903. Serial No. 156,045.

Patented Jan. 30, 1906.

To @ZZ wil/0111] it 11i/ty concern:

Be it known that, we, NELSON Hiss and HENRI G. DE BUREN, citizens of the United States, residing in the city, county, and State of New York, have l plainly shown in Fig. 2, the side view in Fig.

1 permitting to be seen; Each of said cables is provided, as shown, with a separate weight 13, and in order that the cables may be perfectly free to stretch independently the one of the other we prefer to make the pulleys 9 and 10 in independently-rotatable sections. The preferred construction for this purpose is shown in section in Fig. 3. Each cable passes from its anchorage 12 up over the pulley 5 and thence down and under the pulley 7, up and over pulley 6, down and under 1Cpplley 4, over the ulleys Q and 10, then ally to the weig t 13. It will be observed that this arrangement provides for bending of the cable always in one direction. Inspection of the drawings shows that proceeding from the anchorage to the weight the cable passes around all the pulleys in the direction of movement of the hands of a watch. Of course their reverse direction is entirely admissible, provided that the same reversal of direction is applied through all the pulleys. The advantage of this arrangement is that the cables, which in practice are almost always made of steel or iron, will be bent at no oint in opposite directions, and thus the ten ency to bend the fibers beyond their elastic limit will be lessened and the life of the cables greatly advanced.

1. In an elevator, a car, a carrier, a track for said carrier a cable connection between the invented a certain new and useful Improvement in Traction Apparatus, of which the following is a specification.

This invention has particular relation to high-speed passenger-elevators of the traction type wherein one or more driving-cables are taken up by a fixed driving pulley or drum and paid off of the same on the opposite side thereof.

This device is an improvement in the form of elevator described in the patent to vNelson Hiss for traction apparatus dated January 2O i903, No. 718,762.

In the accompanying drawings, Figure 1 shows the preferred arrangement in side elevation. Fig. 2 is a detail in perspective, and Fig. 3 a detail in section.

In the drawings the elevator-car is shown at 1, and at 2 is shown a carrier adapted to move up and down in guides 3, either in the same elevatorshaft with' the carrier, as shown in the drawings, or in a separate shaft.

counterweights for ba ancing the weight of the car 1; but this is not essential to this invention. Y At 4 and 5 are shown two movable pulleys,

having their axes substantially parallel to each other and carried on the carrier 2.

the top of the shaft in which the carrier moves is a fixed ulley 6, having its axis substancar and carrier and two .movable pulleys on tially para el to those of the pulleys 4 and 5. said carrier g in combination with a fixed pul- Alike pulley 7, also having its axis substanley near each extremity of the carrier-track,

a reversible motor arranged to impel one of said pulleys, and a driving-cable anchored at one end and carrying a weight at the other end, said cable passing from its anchorage around one movable pulley, thence in the tially parallel to those of 4 and 5, is placed directly below the lowest point reached by these latter pulleys. An electric motor 8 or e uivalent reversible motive means is emp oyed for driving the pulley 7. The pulleys 9 and 10 are fixed near the top of the shaft of the carrier 2, and these may or may not have axes parallel to those of 4 and 5, as they do not necessarily turn during operation of the elevator.

The driving cable or cables 11 should be arranged as shown in the drawings, one en being anchored, as at 12, and the other end of each cable supporting the tension-weight 13, preferably made flat, so thatl where a group of weights is used they may occupy less room. We prefer to use multiple cablesll, as

top and bottom of said' parallel axes on the n in combination with a carrier respectively fixed pulley having of said movable pulleys directly beneath the the car and carrier and movable pulleys with only'the foremost of the group same direction around one of the fixed pul- TOO its axis parallel to those f pulleys 1o the same direction lowest point of travel of said carrier, a reversible motor for driving the same, two fixed directly above the highest point of travel of said carrier, one of which has its axis paral el to those of said movable pulleys and a driving-cable anchored below said carrier-track at one end and bearing a weight at its other end, said cable passing from its anchorage around one movable pulley, thence in around one of the fixed pulleys, thence in the same direction around the second ixed pulley, thence in the same direction around the second movable pulley and thence around the third xed pulley to the weight, substantially as described.

NELSON HISS. HENRI G. DE BUREN. Witnesses:

FLORENCE P10K, H. S. MACKAYE. 

